5 year Forest River Rockwood owner here
Couple of points to make.
1. You pay for what you get and each brand has various makes and models at various price points.
2. Just like Mt Bikes half the quality is in the components. Fridge, toilet, water pumps all come from various vendors and quality
I've had very good luck with Rockwood (Flagstaff is the same thing, different name ) Dexter torque axels (independent and dampened ) aluminum framed walls and dinettes and bedframes, 5/8 flooring, laminated composite walls.
So one of the more aggravating issues was with a Dometic toilet, the series ended up having a design flaw, so I change it out for a Thetford.
Other than that is is tightening screws, taking care of the black tank and normal stuff.
Advice, the all weather campers are easier to keep cool, keep warm. If you camp in hot areas, get the second AC unit, get the slide toppers.
Good luck